I feel very silly asking this because I can't find anyone else who has ever asked it! I have unlocked every other class, or have access to their quest for the monster classes, and I just can't for the life of me find the Tinker. Help?

This IS strange. Have you never ran into his subdungeon? He used to be in a secret walled off subdungeon which you can acess by destroying a wall tile sorruonding it's entrance.

If you have the Transmuter unlocked, I suppose entering a map and using LEMISI to uncover everything should reveal it. Just make sure it's a map that spawns secret subdungeons (maybe Venture Cave works, otherwise try... I'm not sure, Northern Desert?)

He does have a point. It is a bit out of the way. A new player who has never seen secret sub dungeons (the tinker unlocks them) could miss the unlock. It depends on the area. They should program the subdungeon so only 1 wall is between it and the player (so you can see that it is there), because you'd never realize its existence if it is surrounded by two layers of walls.

Ah ha! I actually had no idea sub dungeons could hide in inaccessible areas. I must admit that I rarely if ever use Binlor, Endiswal, or Lemmisi. If I did I probably would have found the Tinker by now. I'll be sure to visit some of the earlier dungeons to see if I can get the tinker subdungeon to spawn. Thank you for the help!